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Tuberculosis (TB)





Reported Tuberculosis in the United States, 2019						Print
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Table 25. Tuberculosis Cases and Clusters, by Cluster Size1: United States, 2017–2019
See Surveillance Slide #55
Table 25. Tuberculosis Cases and Clusters, by Cluster Size: United States, 2017-2019
Cluster Size
Clusters
Cases2No.
(%)3
No.
(%)4**Total**
**1,351**
**(100.0)**
**3,977**
**(100.0)**2 case cluster
900
(66.6)
1,800
(45.3)3 case cluster
222
(16.4)
666
(16.7)4 case cluster
95
(7.0)
380
(9.6)5 case cluster
37
(2.7)
185
(4.7)6 case cluster
25
(1.9)
150
(3.8)7 case cluster
21
(1.6)
147
(3.7)8 case cluster
13
(1.0)
104
(2.6)9 case cluster
10
(0.7)
90
(2.3)≥10 case cluster
28
(2.1)
455
(11.4)Show More1Clusters have two or more cases with matching spoligotype and 24-locus locus mycobacterial interspersed repetitive unit-variable number tandem repeat type (GENType) within a county during the specified 3-year time period.2Cases with matching spoligotype and 24-locus locus mycobacterial interspersed repetitive unit-variable number tandem repeat type (GENType) are members of a cluster within a county during the specified 3-year time period.3Denominator is total number of clusters.4Denominator is total number of cases.Table Printing Tips
							
					
							Last Reviewed:  October 26, 2020						Source: 	Division of Tuberculosis Elimination, National Center for HIV, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention
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